Guard for elevators



(No Model.) 2 Sheets-Sheet 1. O. J. LATZ. GUARD FOR ELEVATORS.

No. 397,085. Patented Jan. 29, 1889.

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N. PETCRS. Flmw 2 Sheets-Sheet 2.

(No Model.)

Patented Jan. 29, 1889.

UNITED STATES PATENT OFFICE.

CHARLES J. LATZ, OF ROCHESTER, NEWV YORK, ASSIGNOR OFv THREE-FOURTHS TO HENRY L. BECKER AND ABRAHAM ELLIOTT, OF SAME PLACE, AND JOSEPH R. VAN MARTER, OF LYONS, NE\V YORK.

GU-ARD FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 397,085, dated January 29, 1889.

Application filed $epten1her 13, 1888. Serial No. 285,750. (No model.)

To all whom it 77mg concern.-

Be it known that 1, CHARLES J. LATZ, of Rochester, in the county of Monroe and State of New York, have invented a certain new 5 and useful Improvement in Door-Guards for Elevator-\Vells; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings accompanying this application.

My improvement relates to means for operating the doors of elevator-wells by the action of the elevator itself as it goes up and down.

The invention consists in the construction and arrangement of parts, hereinafter described and definitely claimed.

In the drawings, Figure 1 is a front elevation of a portion of an elevator-well, showing one of the doors closed and the elevator beneath it in condition for operating the door as it rises. Fig. 2 is a vertical section in line a: is of Fig. Fig. 3 is an elevation similar to Fig. l, but showing a modification in the construction of the door. Fig. -:i is an enlarged 2' cross-section in line y g ot' Fig. 1. Fig. 5 is an enlarged elevation of the crun-levcn, looking on theinner side and in the direction indicated by the arrow at the top in Fig. i. Fig. 6 is a diagram showing an elevation of the counter-weight and slide for holding thedoor closed. Fig. 7 is a side elevation of the tripping device on the elevator.

A indicates the well, and 13 the elevator-car, said parts being of ordinary construction.

3 5 Oisthe elevator-hatchway door. Figsl and 2 show a solid door designed to close the opening and prevent the passage of fire. Itmoves forward and back, and, as shown in the drawings, is provided with hangers a (1-,ha'vingfri'ction-rollers a a, that run on a rail, Z). Fig. 3 shows a door made up of pivoted bars in the form of lazy-tongs, which open and close by a very small movement.

My improvement is as follows:

D is a case set into the wall of the elevatorwell.

E is a slide that moves forward and back in said case.

0 is a journal attached to said slide, projecting on both sides out through slots (Z d in the case.

is a friction-roller on one end of the journal, and g is a counter-weight connected with the other end of the journal. Said counterweight is pivoted at h to some stationary part, 5 5 and it is adjustable out and in on an arm, '0', to increase or lessen the leverage, and said arm has a forked upper end, 7;, that embraces the journal 0, as shown in Fig. (5. The counterweight has a tendency to throw the slide forward and close the door, and said slide is thrown back only when operated on by the passage of the elevator, as will presently be described, the weight in that case being thrown out of balance, as indicated by the dotted lines in Fig. 6.

Z is a connecting-rod attached at one end to the outer end of the journal 0 and at the other end to a rock-lever, m. Lever m is pivoted at n to some stationary part of the well and extends inward alongside the inner face of the door C.

p is a link pivoted at one end to the top of the rock-lever m and at the other to thedoor,

shown at o. By this means as the slide E is moved forward and back the door will be correspondingly opened an d closed. The rocklever, connecting-rod, and link are used only with a sliding door. In case the pivoted bars are used, (shown in Fig. 3,) theouter ends, 5, of 8c. the bars are pivoted to the side of the well, and the second joint, 25, is connected with the journal 0 of the slide E, by which means the proper action is produced to open and close the door.

G is a cam-lever pivoted at 1/, to the inner side of the well, the long arm n projecting-inside the well and. in such position as to be struck by the tripping device of the elevator as the latter goes up and down. The cam has a central tongue, w, and two curved slots, 2 2, Fig. 5, in which the friction roller f rests. lVhen the cam-lever stands in the horizontal position shown in full lines, Fig. 5, the end of tongue 20 rests against the friction-roller f, 5

and serves as a stop to same and holds the slide E forward, and consequently holds the door 0 closed. hen the cam-lever is thrown up or down, as indicated by the dotted lines, Fig. 5, the tongue releases from El'lClLlO1]1Oll1' f, and the latter, and with it the slide E, is drawn back by reason oi' the roller tiollowing' back in one or the other of the curved slots ,2

In such case the door is drawn open.

ll is the tripping device on the elevator. It consi. s of a slide that is adjustable out and in. \Vhen it thrown out, it stands in position to strike the end of the cam-lever G and the cani-leverfroin the horizontal position up or down, and the counterweight bri ng's it back to place again and closes the door.

llavii'ig described my invention, what I claim as new, and desire to secure by Letters Patent, is-

ii. The combination, with the elevator-car provided with a tripping device, of the sliding door, a slide provided. with ournals, a double acting cam-lever connected with one of the journals and servingto operate the slide as the car goes up or down, aconliter-weight eonneeted with the oth er journal, servi ng to throw the slide forward, and connections between the slide and the hatchwa y-door, \vherel y the door is operated by the slide, asherein shown and described.

In. a door-guard for elevator-wells, the combination, with the slide E, provided with a journal that extends out through a slot in its case, of the do able-acting cam-lever G, provided with curved slots z,whieh embrace the journal, and a central tongue, u, that holds against said journal when the parts are in their norn'ial (()ll(lltl()ll,i18 herein shown and described.

In witness whereof I have hereunto signed my name in the presmice of two sl'ibscribing witnessi'ls.

( IIARLES J. llAlZ.

\Vitnesses:

R. 1*. Osoooo, M. 1). PHILLIPS. 

